Exporting Web format KML/KMZ Any Data as Images - how to get good quality overlay with labels

Basin on ANOB shapefile from https://data.gov.uk/dataset/8e3ae3b9-a827-47f1-b025-f08527a4e84e/areas-of-outstanding-natural-beauty-england
I'm trying to get good quality KMZ Overlay, which will include png images.Unfortunately overlay I get looks really badly, cause of strange labeling appearing despite it's not visible on GM window
1. GM window

2. KMZ exported from Global Mapper as PNG (in attachment - ANOB_GM_2.zip), open in Google Earth - multiple labels + unexpected RED labels (not on GM window)

3. For compare QGIS window, where Labels based on Name value showing only on "Main" areas, while smaller parts have no label. That's desired solution.

Please advice, how to export KMZ with labeling only for the main area, and not export terrible blurred labels which appear on the background.
I'm trying to get good quality KMZ Overlay, which will include png images.Unfortunately overlay I get looks really badly, cause of strange labeling appearing despite it's not visible on GM window
1. GM window

2. KMZ exported from Global Mapper as PNG (in attachment - ANOB_GM_2.zip), open in Google Earth - multiple labels + unexpected RED labels (not on GM window)

3. For compare QGIS window, where Labels based on Name value showing only on "Main" areas, while smaller parts have no label. That's desired solution.

Please advice, how to export KMZ with labeling only for the main area, and not export terrible blurred labels which appear on the background.
Answers
If it helps I've done a very quick KMZ for you - it's in the zipped folder.
By the way the vector data is too detailed for Google Earth so I simplified the polygons using a 2m horizontal threshold first before creating the KMZ.